Mechanism for removing burrs from tubes



July 31, 1928. 1,678,963

M. H. SUSSMAN MECHANISM FOR REMOVING BURKS FROM TUBES Fil ed Aug. 12,1927 s Sheets-Sheet 1 4/ YIHFL Iv INVENTOR MA'XWELL ASIAifSMH/VATTORNEYS July 3191928. 1,678,963

M. H. sussMAN MECHANISM FOR REIIOVING BURRS FROM TUBES INVENTQR MAXWELLMSU-SJMHN BY I flk KA.MAz/ T Wu7,

ATTORNEYS Filed Aug. 12, 1927 3 Sheets-Sheet 2 37 E1 I 29H 2/ 37C I lglg 77 32 y7 36 r 6 Patented July 31,1928.

MAXWELL n. 'sussmAN, or xnw GARDENS, NEW YORK, ASSIGNOB To THE ELYRIAmon AND smut cours ng or CLEVELAND, 'omo, A coaronanon or emo.

mnonarusm roe mmovine BUR-RS mom runs. 1

n ueau sled August 12, 1927. serial in. 212,541.

The invention relates to the art 'of making welded steel tubing, moreparticularlyof speaking tubes of the indicated clas'sare electrically orgas welded along the seam, during the'proccss of production, the hot, sol't-metal being pressed at said seamiatthe 1O instant-of welding. Thisoperation results in the formation of a burr lengthwisejof and at saidseam which is requiredjto beremoved in'order to give to'the tube thedesired finished appearance. The problem of removing such burrs has beenadifiiculty which has been met in someinstan'ces' by a separate grindingoperation performed .by"

.means offa grinding wheel, emory' beltor f equivalent means or byrolling downover a mandreL', The efiicient'solution of the problembecomesparti'cularly difiicult when it comes to tubes of'relativelysmalldiam eter, as for instance tubes'having'diameters below seveneighths of an inch; wlth tubes of such small diameters 1t is notpracticable to utilize the methods which have'been found satisfactorywith respect to I tubes of larger l diameters than those indicated. Ithashertof ore been attempted to ayold the exist ng difficulties by firstproducing the'tubes n larger diameters capable of being treatedaccording to present methods and then by drawing and annealing, reducingsaid larger tubes to the desired smaller dimensions; this asprocess isboth slow and expensive. The

present invention has for its ob]ect the provision of a novel and simplemachine whereby the outer burrmay be efliciently and economicallyremoved from the tubes immediately following the welding operation, and

more particularly contemplates a machine adapted especially foroperating ion tubes of reduced diameters; Other.- objects will appearfrom the descriptionhereinafter and T .t'he features of novelty willfbe' vpointed out in the claims.

In the accompanying" which show an exampleof the invention'fwithou'tdefining .its limits, Fig, 1 is e-side elevation of a tubing machineembodying thefndvel features 'Fi g. 2 is a seetional'gelevation taken]approximately on'.'the-fline;2.;2uof Fig. 1';; i Q Fi 3 is asideelevationof the burr remov; ing mechanism; Fig. 4is an enlargeddetail horizontal'seetion illustrating .the" cutter-"-adjusted-positiona bolt' 30' passes through 1110 horizontal front Viewthe typeusedin the construction of metal furniture-Q 'standardsforlamps, automobile 5 valve rods. andsimilar articles. Generally .in-whichthecustomary weldingelectrode 10 tube making machine of the illustratedexample furtherincludes finishing rolls 16 and d8, the uppervroll 16 ingscrew 2Q. The-finishing rolls 16; and-17 .plai'ned hereinafter. v All ofthe isadjustably mounted in any conventional I mannerupon thejst'anda rd11 which projects upwardlyirom the base 12;;the latter is supported-upon orcomprises part of the usual. supporting frame--13; The customaryside pressure rolls-l4 are-adjustably mounted upon tliebase-12an d arecontrolled by the hand wheel 15 in the well known way. The

17 mounted vas lsualin a suppo'rtingframe 1 H I 'a s-'usual, beingadjustable by means of'gear ng-19 andan adjust are driven in 'any-con'v'enient Way, usually by suitably applying power to both-rol1s"'tofinish the tube a after the burr'has been removed therefrom jin themanner to bee parts so far described may Ibe' of any we'll known' 'typeand arrangementand formfno part of the invention. The burr removingmechanism, in the form illustrated in the drawings, is located betweenthe welding unit and the finishing unit of the tube making machine,preferably as close as possibleto the form'er, and comprises an upright.sub-frame 21'- projecting upwardlyfrom a base 22 carried'by'the sup'-,porting frame 13, as shown in Fig.. 1';. The upright frame 21 isprovided with spaced, parallel guides 23iarranged in opposite pairsfor-"slidably accommodating bearing blocks adjusted vertically for thprp'q'se tobe more fully set forthhereinafterg The cross- ..web 25- issuspendedby .meansfof screw- ,threaded rods 26 secured thereto at 27 andpassing loosely through a cross-bar 28 rig-f idly supported upon theframe 21 as shown in Fi'gaQ and 3; the iscrewthreadediends of the rods'26 freceive nuts 29f w'hi.ch' .bear

against the cross-bar 28 and const itute the means wherebyfthecrossweb25 and with it thebearing buc s-2'4 are 'raisedand lowered alongthe'guidQS' T o fix-theweb 25 and blocks 24 against1 undesirablevibration in an '5 rections to correspondingly shift the cutter 32relatively to the work comprises a,' rotati v :the cross-bar 28 inscrewthreadedengagement therewith andbears with its end n against theweb as illustrated in Fig'. 2:

' The bearingblocks 24 constitute journals for a cutter'shaft 31 onwhich amilling cut ter 32is mounted, the latter being suitablyjand'removablyfixed on said shaft 31 iniany' --conven ientmanner, as forinstance "by.bein

1 clamped between an-.annular 'shoulder"-33 o y 0 3 threaded portion 35with whichflsaid shaft the shaft 31 and a nut'34 screwed )uPon/a Yr 1 isprovided; to positively 'fasten thecutter 32 on the shaft 31againstindependent, rela 'sub-frame'21, saidworm' shaft; 5 l carrying aworm-ge 551 in meshwith a worm 'se A cured upon 'aidriv'e' shaft 561.The'latter isk rotatable in bearings57 forming part of said auxiliaryframe 53 [audgi s provided witha sprocke t wheel 58 connected by meansof a v tive rotation a key 36 projecting intojco qp-j cratingkeyways-fis provided ,as shown. in

Fig, 4. The cutter shaft-1.3]; is' rotated to operate the cutter 32; by.means of'a sprocket chain 37 andsprocket wheels 38 and 39, the latterbeing secured upon" the shaftAO of an electric motor 41, which, asillustrated-in;

Figs. 1, 2 mic, is mounted. upon the, sub

frame 21-.- The sprocket wheel 38l'i-s, 'rotat-"i,

ably mounted upon one of the bearing' blocks 24 =by means of a' ballbearing 38f-g and is fixed on said block against movement inexialdirections. A take-up roll 37 carried by a pivoted member: 37 which: isacted-upon by a spring 37 may be, provided for; auto-' matically takingupslack'in the chain 37.

sprocket chain 59 with ia.sprocketpinion' fastened upon; the shaft oftheupper finish in roll 16- and-ureceiving powe'ntherefrom {i nr'ordermaintainthe tube 1 against" vibration and twisting and to provide "foradjustment thereof against the cut .ter 32,; a grooved supporting/ 01161;- i' -1oca'ted below said cutter 32; and is journalledin a: forkedbearing- .621 carried by fa screwt'hreaded stemthe latter isyyert-icallymovable i'nastandard- =fiXed upon; the base about its axis-inv any.suitable {manneras by means ofaakeywayand key; A notched nut of themachine 'andis held *againstrotation 64:- is. rotatably' mounted, uponthe standard 65-and is maintainedinpositionin anyfconfvenient manner asby; means of a'pawljand ,spring: engaging said notches. With this) Inorder-to distribute the wear over all parts.

of the'cutting periphery of the cutter 32 to thereby prolong the activelife thereof,-the cutter shaft 31, in addition to' being rotatable inthe blocks 24, is: slidable therein in'the direction of its length andrelatively to the sprocket wheel 38. For this, purpose; andin order toat all times maintain an operative'conne'ction between said sprocketwheel 38 and the shaft '31, the latterjisformed with a squared orotherwise polygonal convroll' 6Q arranged 'aboveysaid roll 66 beingq'ourna'lled on a arrangementgthejroll 61 may 'beraise'd "and .lowered bt rm gi-the; nut 64, to properly,

support the :tubefqg inoperative. relation to the cutter 32.in"a--mannerx to prevent vibra- 7 lion. and" twistingof said tubewhereby the proper, removal of the burr mightbe interfered; with.addition; to; the supporting roll,61,;there.is rovided a grooveda-uxiliary stud'secured to-a,1ink67 .The'latter is pivtinuation' 42which Tslidably fits a cone spondingly shaped axial opening in 'saidsprocket wheel 38. To protect theconnection between the end.4:2 of theshaft 31" and the sprocketwheel 38 against'the efiects of: dust andother forelgn mattera dust cap 38 is secured to the sprocket wheel 38 tocover the aforesaid continuation 42 of the shaft'Sl as shown in Fig. 4.*The'means whereby'the shaft 31 is moved in axial din able disk .43 onwhich a bushing' is eccentrically mountedtoj function in the nature of acrank. .The'bushing' 44 projects into 'the curved groove 45 of a member46 which is fixed against rotation by and-is slidable from one of theblocks 24 as shownin Fig.

4. The member'46 surrounds the shaft 31 on .a guide pin 47 projectingoutwardly} which is journalled therein preferablyfinaball bearing'48,said member 46 being ar-f ranged to impart lengthwise reciprocatingmovements to said shaft 31 for instance through the mediumofa flangedwasher 49 oted 'atfi68' for rai'singfa'nd lowering the roll '66 and isfixed irr'an adjusted'positionf by means 'ofa bolt 69 whichpassesthrough' a curved slot. 70 in. the link 67 {as shown in oneutralizethe heat developed in the.

tubea during the welding thereof; andin to. engage the tube a from thecutter 32 duringthe removal thereby of theIburn'proyision is made to.cool the cut ter 32. I This may :be doneby providing a catch'diagrammatlcallyin Fig. 1.

In ractice the tube a after having been "shape to the determined cross.sectional form usuall round is passed in operative 115 .Z '5ipeh71th'roughwhi-ch oil orgot-her 'cfoollng uid is directed a ainstthe cutteras indi- .relationto t e welding electrode 10 whereby I theseam of. thepreviously vformedtube'is- Welded to vthereby complete the structure ofsaid tube. v This welding operation creates a'substantial burr 6 alongthe seam, the

height of'said" burr dependin ,upontlie' amountoiheatand.pressureimarted to the c tube a; it is. necessary to remove .this burr btrom the miter"- surface or said-' tubeitfi iml part the desiredfinished appearance thereto L erly position'the tuie a with respect tosaid.

To accomplish this purpose the tube 'subsei quently to the weldingoperation :continuesits travel 'in' a lengthwise direction, and in.- theheated condition developed "therein; by I the welding operation final] ypasses in tan-Q gential relation to themil'lingcutter 32, the

latter being rotated through the nicd-i 'nnj-of the motor 41 and thesprocket Wheels 38and' 39 and sprocket chain 37 ina direction-.oppoi}site to the direction of travel of 't-lic' tube 5;;

Thesupporting roller 61 and ailxili'aiyi'oll' 66 having previous] beenadjusted .to' propcutter the latter Will operate to cutawayjthe burr band to thereby leave the tube a in a condition ready to be actedupon'theflinish-f ing rolls 16 and 17 and-any otherfollowing rolls towhich said; tube passes subsequently to'the removal ofthe burr b.":As'tlieaforesaid operations take place the sprocket wheels 58 and 60-and the. sprocketchain 59 i Will rotatethes'haft 56 andtlierebythr-kliug'li the medium "of the, worm 5mm "wr'irn'i" go 56,Willrotatably actuate the'shaft 51' and the" disk {13; The bushing 44'is thereby caused; to describe thecircular path about theaxls of theshaft '51 in the nature ofa crankwhereby the member- 46: is ,inolved.to? and fro along theLguide stu'd4.7. TliiS-lto-and' fro movement of themember'i lfi-is transmit ted to the shaft 31" and imparts to. the lattera slow, reciprocatory movement in the direc-" tionof its axis.This-operation ofI- the' shaft 7 31 accordingly reciprocates the. cutter32 transversely of the tube a and accordingly brings all parts of thecutting periphery of said cutter intoacti've use for cuttingiaivaythespiritof the invention.

the burr b. Tlhis 'reciprocatory motion of the cutter maintains j thecutting edge for a long time, as the hot metal tends toaeat itawayrapidly otherwise, As the shaft 31 moves back and forth in themanner set;

forth, the squared continuation 42 will slide relatively to the}sprocket Wheelj38 in the axial opening thereof Without efiectingtheoperative connection said sprocket Wheel. v A

The machine is simple in construction and reliable in operation andprovides an efiicient solution to the' problemof removing burrs high'orlow from inetalf tubes of all', sizes, and particularlysolves'theproblem of removing the burr' .fro m..'sucli' tubeso'fjrelatively small diameters.

Various .fcha'nges in'the. specific forms shown and described may; be'made fronitlie scope of the claims withoutdeparting from Iolaimz. 1LIna machine for removing burrs from tubes, the combinationrof'means forsupporting a travellingtube having an external burr extendinglengthwisethereof, bearings,

located inspaced axial'ali'gnment with each "gutter; I, v r

. 2. In a machine for removing burrs from v between.said' shaft andother, a sprocket- Wheel. rotatahly mounted 'on one of, said bearingsand'fixedtliereon; i I i against" movement in axial directions, 5' saidsprocket whee'l being connected with a sourc'e of power, a' cutter-shaftjournall'ed in"-;sa'i d and connected. with said shaft, Ia crankfdisk ofsaid-shaft andsaijd cutteriis reciprocated tube Sim n etal tubes; thecombination j of vmca-ns jfor supporting a travelling tube havingaii"ex- {transversely "of the path of travel' ofisaid f ultaneously withthe. rotation of sa d.

lternahlii 'rrj extending lengthwise thereof, a fi'aine provi-ded withvertical guides, bearing blo'cksvertieally adjustable on said guides, a1

cross-web connecting said blocks in the form of a bearing unit, meansfor vertically adjusti-i'igfsaid bear ng unit, ineans-forjfixing'szi'idfieai'ing unit in an adjusted position tivel'y -to saidSprocket-Wheel, means where by said sprocket-wheel and cutter-shaft areconnected to move in unisonfwitho'ut inter-. ference with the aXialsIidabilit-y of; said shaft, a cutterheel carried by' 's'aidsha-ft i forcutting away said burr, a guide-pin' projecting from one of saidbearings, a. grooved against vibration,asprocket-Wheeljournalled'on-oneof said bearing blocks and fixed there- .onagainst movement inaxial directions, said sprocket being-'connected' vith meme of I vpower, aciitter-shaftjournalled-in'said bear:

ing'bloc'ks and axially'slidable therein relamember slidably mounted .onsaid 'guide-pin' j and connected ivith said shaft, a' crank-disk havinga bushing'projectingfintothe groove of said member, and inechani'sm' forrotating said disk whereby said memberland shaft are reciprocated in thedirectionof the axis transversely of the path of travel of saidtubesiniulta'neouslywith thefrbtation of said cutter..

.of said shaft and said-cutter 'i's-reciprocated 3. In a-maohine r01-removing burrs.- from metal tubes, the co'mbinatio'n-of meansforSupporting a travelling. tube having an external burr extendinglengthwise; thereof, a

frame provided with vertical guides-,vbearing'; blocks 'vertically.adjustableon said j guides, a 'cross-Webconnecting said blocks. in I theform of a bearing unit, a'pairof adusting screws connectedW1thsa1dcross-web tangular openingof said sprocket-wheel, a cutter-wheelcarried by said shatt for-.cut-

ting away said burr, a; guide-pin projecting from one of said bearlng's,a grooved member slidably mounted on said guide pin and connected withsaid shaft, a crank-disk having a bushing projecting into the groove ofsaid member, and mechanism for rotating said disk whereby said memberand shaft are reciprocated in the direction of'the-axisof said shaft andsaid cutter is .reciprocated transversely of the path of travel of saidtube simultaneously with the rotation of said cutter. 4 Y

4. In atube making machine, thecombination of welding means whereby thelength-' wise seam of a travelling tube is welded and an external burrisproduced lengthwise of i said seam, upper and lower finishing rollslocated inspaced relation to-said welding means, means for driving saidfinishing rolls, a sub-frame in said machine between said welding meansand finishing rolls, a vertical- 1y adjustable grooved roller on saidsubframe for supporting said travelling tube, spaced vertical guides onsaid sub frame,

bearing blocks vertically adjustable on said Q guides, across-webconnecting said bearing locks in the form-oi a bearing unit, a pair I ofadjusting screws connected with. said cross-web and co operating withsaid subframe for vertically adjusting said bearing un1t,aset screw onsaid sub-frame bearing against said cross-web for fixing said bear mgunit m an ad usted pos tion against one of said bearing blocks and fixedtherevibration, a sprocket-wheel journalled on on a ainst movement inaxial directions said sprocket-wheel being provided with a rectangularaxial opening, amotor carried by sin sub-frame and havlng a sprocketconnected with said first sprocket-wheel for driving the same, acutter-shaft journalled in said bearing and axially slidable thereinrelatively to said first sprocket-wheel, said shaft having a squaredextension 'slidably fitting, the rectangular opening of said firstsprocket, a cutter-wheel carried by said shaft for cutting away saidburr, a guide-pin projecting from one of said bearing blocks, a

grooved member slidably mounted on said guide-pin and connected withsaid shaft,va

crank-disk having a bushing projecting into 1 the groove ofjsaid member,worm gearing forirotating said disk whereby said member and-shaft arereciprocated in the direction of the axis of said shaft and said cutteris reciprocated transversely to .the path of said tube simultaneouslywith the rotation of said 'cutter, and a connection from thefinishingrolls to said worm gearing whereby 75 the latter-is operated.

In testimony whereof I have hereunto set 4 my hand. I

MAXWELL'H. SUSSMA'N; f

